Linear brushless D.C. motor with stationary armature and field and with integratable magnetic suspension

a brushless d.c. motor and stationary armature technology, applied in the field of brushless motors, can solve the problems of not being able to extend the motion of the structure, requiring considerable magnetic material, not being low cost nor lightweight, etc., to improve heat rejection, shorten the flux path, and extend the operational capacity
US7617779B2Active Publication Date: 2009-11-17SHAPERY SANDOR WAYNE
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
SHAPERY SANDOR WAYNE
Publication Date
2009-11-17

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Abstract

This disclosure describes an electromagnetic system for efficient propulsion, suspension, and guidance. The track is inexpensive totally passive steel. This linear form of the D.C. motor provides traction motor characteristics without physical contact, The moveable element (vehicle) comprises both the integrated armature and field magnet flux source which induces magnetizing flux into pairs of rails each energizing a set of interdigitated poles of alternating polarity in the track against which its own armature conductors interact for thrust and braking. This source of magnetic flux requires no power and provides passive suspension at any speed and, with control, guidance. The permanent magnet and control flux in common airgaps multiply the effectiveness of lateral control for magnetic stabilization and to restrain external forces.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to U.S. Provisional Application No. 60 / 627,706, filed on Nov. 15, 2004.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] This invention relates to brushless motors, and in particular to linear brushless motors.

[0004] 2. Description of the Related Art

[0005] The history of linear motor technology dates far into the past. To simplify, this will be divided into the electromagnetic design and the commutation. With regard to the electromagnetics, motor technology proceeded primarily in rotary form. The linear motor form is also old, this can further broken into actuators and linear motors. Actuators may be defined as short linear or rotary devices and have unique structures not feasible for extended motion. Linear motors are defined here as electromagnetic devices which need or use commutation to extend their range of useful stroke.

[0006] The electromagnetic design of linear motors follows the well-kn...

Claims

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